According to an AFP report, scientists are trying to find a way to install kangaroo parts in Australian and New Zealand cattle and sheep. Methane from livestock's gaseous emissions accounts for 14 percent of greenhouse gases in Australia and up to 50 percent in New Zealand. Since kangaroos' flatulence contains no methane, the scientists reckon that genetically engineering herds with special bacteria and extra stomachs found in 'roos could help decelerate global warming.